Insulating cup sleeve



FIG. 1 is a perspective view of an insulating cup sleeve;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an exploded perspective view showing the insulating cup sleeve in a usage environment with a cup, forming no part of the claim;

FIG. 6 is a perspective view showing the insulating cup sleeve in an alternate usage environment;

FIG. 7 is a side view thereof;

FIG. 8 is a top view thereof; and,

FIG. 9 is a bottom view thereof.

The broken lines are shown for the purpose of illustrating environmental subject matter and parts of the article that form no part of the claimed design. 

CLAIM The ornamental design for an insulating cup sleeve, as shown and described. 